From: Olga Kornievskaia <olga.kornievskaia@gmail.com>
To: "J. Bruce Fields" <bfields@fieldses.org>
Cc: trond.myklebust@hammerspace.com,
Anna Schumaker <anna.schumaker@netapp.com>,
"J. Bruce Fields" <bfields@redhat.com>,
linux-nfs <linux-nfs@vger.kernel.org>
Subject: Re: [PATCH v7 15/19] NFSD add COPY_NOTIFY operation
Date: Tue, 1 Oct 2019 20:14:39 -0400 [thread overview]
Message-ID: <CAN-5tyGmMVU7grQq=cAEngHLhKy2yCn2k8U0h7-hRnwx9iScNw@mail.gmail.com> (raw)
In-Reply-To: <20191001205900.GB4926@fieldses.org>
On Tue, Oct 1, 2019 at 4:59 PM J. Bruce Fields <bfields@fieldses.org> wrote:
>
> On Mon, Sep 16, 2019 at 05:13:49PM -0400, Olga Kornievskaia wrote:
> > @@ -2914,7 +2983,8 @@ static bool client_has_state(struct nfs4_client *clp)
> > #endif
> > || !list_empty(&clp->cl_delegations)
> > || !list_empty(&clp->cl_sessions)
> > - || !list_empty(&clp->async_copies);
> > + || !list_empty(&clp->async_copies)
> > + || client_has_copy_notifies(clp);
>
> Sorry, remind me--how is the copy_notify stateid cleaned up? Is it just
> timed out by the laundromat thread, or is our client destroying it when
> the copy is done?
Copy_notify stateid in most cases should be removed by
nfs4_put_stid()/ the "parent" stateid going away (close, unlock,
delegreturn) (or in unlikely case, if the client sent an
OFFLOAD_CANCEL to the stateid, say if copy was canceled). Otherwise,
copy notify stateid will time out and be removed by the laundromat
thread. So if a client didn't send a close/unlock/delegreturn and
quickly tries to delete a clientid, it will get ERR_CLID_INUSE but I
think if there was no close, the server will have an issue of having
an open stateid state.
> I'm just wondering if this can result in NFSERR_CLID_INUSE just because
> a copy was done recently.
>
> --b.
>
> > }
> >
> > static __be32 copy_impl_id(struct nfs4_client *clp,
> > @@ -5192,6 +5262,9 @@ static bool clients_still_reclaiming(struct nfsd_net *nn)
> > struct list_head *pos, *next, reaplist;
> > time_t cutoff = get_seconds() - nn->nfsd4_lease;
> > time_t t, new_timeo = nn->nfsd4_lease;
> > + struct nfs4_cpntf_state *cps;
> > + copy_stateid_t *cps_t;
> > + int i;
> >
> > dprintk("NFSD: laundromat service - starting\n");
> >
> > @@ -5202,6 +5275,17 @@ static bool clients_still_reclaiming(struct nfsd_net *nn)
> > dprintk("NFSD: end of grace period\n");
> > nfsd4_end_grace(nn);
> > INIT_LIST_HEAD(&reaplist);
> > +
> > + spin_lock(&nn->s2s_cp_lock);
> > + idr_for_each_entry(&nn->s2s_cp_stateids, cps_t, i) {
> > + cps = container_of(cps_t, struct nfs4_cpntf_state, cp_stateid);
> > + if (cps->cp_stateid.sc_type == NFS4_COPYNOTIFY_STID &&
> > + !time_after((unsigned long)cps->cpntf_time,
> > + (unsigned long)cutoff))
> > + _free_cpntf_state_locked(nn, cps);
> > + }
> > + spin_unlock(&nn->s2s_cp_lock);
> > +
> > spin_lock(&nn->client_lock);
> > list_for_each_safe(pos, next, &nn->client_lru) {
> > clp = list_entry(pos, struct nfs4_client, cl_lru);
> > @@ -5577,6 +5661,24 @@ static __be32 nfsd4_validate_stateid(struct nfs4_client *cl, stateid_t *stateid)
> > out:
> > return status;
> > }
> > +static void
> > +_free_cpntf_state_locked(struct nfsd_net *nn, struct nfs4_cpntf_state *cps)
> > +{
> > + WARN_ON_ONCE(cps->cp_stateid.sc_type != NFS4_COPYNOTIFY_STID);
> > + if (!refcount_dec_and_test(&cps->cp_stateid.sc_count))
> > + return;
> > + list_del(&cps->cp_list);
> > + idr_remove(&nn->s2s_cp_stateids,
> > + cps->cp_stateid.stid.si_opaque.so_id);
> > + kfree(cps);
> > +}
> > +
> > +void nfs4_put_cpntf_state(struct nfsd_net *nn, struct nfs4_cpntf_state *cps)
> > +{
> > + spin_lock(&nn->s2s_cp_lock);
> > + _free_cpntf_state_locked(nn, cps);
> > + spin_unlock(&nn->s2s_cp_lock);
> > +}
> >
> > /*
> > * Checks for stateid operations
> > diff --git a/fs/nfsd/state.h b/fs/nfsd/state.h
> > index d9e7cbd..967b937 100644
> > --- a/fs/nfsd/state.h
> > +++ b/fs/nfsd/state.h
> > @@ -56,6 +56,14 @@
> > stateid_opaque_t si_opaque;
> > } stateid_t;
> >
> > +typedef struct {
> > + stateid_t stid;
> > +#define NFS4_COPY_STID 1
> > +#define NFS4_COPYNOTIFY_STID 2
> > + unsigned char sc_type;
> > + refcount_t sc_count;
> > +} copy_stateid_t;
> > +
> > #define STATEID_FMT "(%08x/%08x/%08x/%08x)"
> > #define STATEID_VAL(s) \
> > (s)->si_opaque.so_clid.cl_boot, \
> > @@ -96,6 +104,7 @@ struct nfs4_stid {
> > #define NFS4_REVOKED_DELEG_STID 16
> > #define NFS4_CLOSED_DELEG_STID 32
> > #define NFS4_LAYOUT_STID 64
> > + struct list_head sc_cp_list;
> > unsigned char sc_type;
> > stateid_t sc_stateid;
> > spinlock_t sc_lock;
> > @@ -104,6 +113,17 @@ struct nfs4_stid {
> > void (*sc_free)(struct nfs4_stid *);
> > };
> >
> > +/* Keep a list of stateids issued by the COPY_NOTIFY, associate it with the
> > + * parent OPEN/LOCK/DELEG stateid.
> > + */
> > +struct nfs4_cpntf_state {
> > + copy_stateid_t cp_stateid;
> > + struct list_head cp_list; /* per parent nfs4_stid */
> > + stateid_t cp_p_stateid; /* copy of parent's stateid */
> > + clientid_t cp_p_clid; /* copy of parent's clid */
> > + time_t cpntf_time; /* last time stateid used */
> > +};
> > +
> > /*
> > * Represents a delegation stateid. The nfs4_client holds references to these
> > * and they are put when it is being destroyed or when the delegation is
> > @@ -624,8 +644,10 @@ __be32 nfsd4_lookup_stateid(struct nfsd4_compound_state *cstate,
> > struct nfs4_stid **s, struct nfsd_net *nn);
> > struct nfs4_stid *nfs4_alloc_stid(struct nfs4_client *cl, struct kmem_cache *slab,
> > void (*sc_free)(struct nfs4_stid *));
> > -int nfs4_init_cp_state(struct nfsd_net *nn, struct nfsd4_copy *copy);
> > -void nfs4_free_cp_state(struct nfsd4_copy *copy);
> > +int nfs4_init_copy_state(struct nfsd_net *nn, struct nfsd4_copy *copy);
> > +void nfs4_free_copy_state(struct nfsd4_copy *copy);
> > +struct nfs4_cpntf_state *nfs4_alloc_init_cpntf_state(struct nfsd_net *nn,
> > + struct nfs4_stid *p_stid);
> > void nfs4_unhash_stid(struct nfs4_stid *s);
> > void nfs4_put_stid(struct nfs4_stid *s);
> > void nfs4_inc_and_copy_stateid(stateid_t *dst, struct nfs4_stid *stid);
> > @@ -655,6 +677,8 @@ extern struct nfs4_client_reclaim *nfs4_client_to_reclaim(struct xdr_netobj name
> > extern void nfs4_put_copy(struct nfsd4_copy *copy);
> > extern struct nfsd4_copy *
> > find_async_copy(struct nfs4_client *clp, stateid_t *staetid);
> > +extern void nfs4_put_cpntf_state(struct nfsd_net *nn,
> > + struct nfs4_cpntf_state *cps);
> > static inline void get_nfs4_file(struct nfs4_file *fi)
> > {
> > refcount_inc(&fi->fi_ref);
> > diff --git a/fs/nfsd/xdr4.h b/fs/nfsd/xdr4.h
> > index 8231fe0..2937e06 100644
> > --- a/fs/nfsd/xdr4.h
> > +++ b/fs/nfsd/xdr4.h
> > @@ -542,7 +542,7 @@ struct nfsd4_copy {
> > struct nfsd_file *nf_src;
> > struct nfsd_file *nf_dst;
> >
> > - stateid_t cp_stateid;
> > + copy_stateid_t cp_stateid;
> >
> > struct list_head copies;
> > struct task_struct *copy_task;
> > --
> > 1.8.3.1
next prev parent reply other threads:[~2019-10-02 0:14 UTC|newest]
Thread overview: 39+ messages / expand[flat|nested] mbox.gz Atom feed top
2019-09-16 21:13 [PATCH v7 00/19] client and server support for "inter" SSC copy Olga Kornievskaia
2019-09-16 21:13 ` [PATCH v7 01/19] NFS NFSD: defining nl4_servers structure needed by both Olga Kornievskaia
2019-09-16 21:13 ` [PATCH v7 02/19] NFS: add COPY_NOTIFY operation Olga Kornievskaia
2019-09-16 21:13 ` [PATCH v7 03/19] NFS: add ca_source_server<> to COPY Olga Kornievskaia
2019-09-16 21:13 ` [PATCH v7 04/19] NFS: also send OFFLOAD_CANCEL to source server Olga Kornievskaia
2019-09-16 21:13 ` [PATCH v7 05/19] NFS: inter ssc open Olga Kornievskaia
2019-09-16 21:13 ` [PATCH v7 06/19] NFS: skip recovery of copy open on dest server Olga Kornievskaia
2019-09-16 21:13 ` [PATCH v7 07/19] NFS: for "inter" copy treat ESTALE as ENOTSUPP Olga Kornievskaia
2019-09-16 21:13 ` [PATCH v7 08/19] NFS: COPY handle ERR_OFFLOAD_DENIED Olga Kornievskaia
2019-09-16 21:13 ` [PATCH v7 09/19] NFS: handle source server reboot Olga Kornievskaia
2019-09-16 21:13 ` [PATCH v7 10/19] NFS: replace cross device check in copy_file_range Olga Kornievskaia
2019-09-16 21:13 ` [PATCH v7 11/19] NFSD fill-in netloc4 structure Olga Kornievskaia
2019-09-16 21:13 ` [PATCH v7 12/19] NFSD add ca_source_server<> to COPY Olga Kornievskaia
2019-09-16 21:13 ` [PATCH v7 13/19] NFSD return nfs4_stid in nfs4_preprocess_stateid_op Olga Kornievskaia
2019-10-02 15:52 ` J. Bruce Fields
2019-10-02 16:12 ` Olga Kornievskaia
2019-10-02 16:15 ` Olga Kornievskaia
2019-10-02 16:34 ` J. Bruce Fields
2019-10-02 16:52 ` Olga Kornievskaia
2019-10-02 16:57 ` J. Bruce Fields
2019-09-16 21:13 ` [PATCH v7 14/19] NFSD COPY_NOTIFY xdr Olga Kornievskaia
2019-09-16 21:13 ` [PATCH v7 15/19] NFSD add COPY_NOTIFY operation Olga Kornievskaia
2019-10-01 20:59 ` J. Bruce Fields
2019-10-02 0:14 ` Olga Kornievskaia [this message]
2019-10-02 1:35 ` J. Bruce Fields
2019-10-02 15:32 ` Olga Kornievskaia
2019-09-16 21:13 ` [PATCH v7 16/19] NFSD check stateids against copy stateids Olga Kornievskaia
2019-09-16 21:13 ` [PATCH v7 17/19] NFSD generalize nfsd4_compound_state flag names Olga Kornievskaia
2019-09-16 21:13 ` [PATCH v7 18/19] NFSD: allow inter server COPY to have a STALE source server fh Olga Kornievskaia
2019-10-02 19:55 ` J. Bruce Fields
2019-10-07 14:31 ` Olga Kornievskaia
2019-10-07 18:20 ` J. Bruce Fields
2019-09-16 21:13 ` [PATCH v7 19/19] NFSD add nfs4 inter ssc to nfsd4_copy Olga Kornievskaia
2019-09-19 19:55 ` [PATCH 1/1] " Olga Kornievskaia
2019-09-30 19:06 ` [PATCH v7 00/19] client and server support for "inter" SSC copy Olga Kornievskaia
2019-10-01 17:13 ` J. Bruce Fields
2019-10-01 17:47 ` Olga Kornievskaia
2019-10-01 17:50 ` J. Bruce Fields
2019-10-01 19:03 ` Olga Kornievskaia
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